Difficult to get information, seems like the A15 has 2x 3.2 ghz cores whereas the S8G2 has 1x 3.2 hgz core. Searched a little bit on Google but could not come up with detailed - only fragmented - information on L1/L2/L3 caches for the A15 and S2G2.

But I thought we were talking Server/Desktop chips, not phone chips (I have no clue about them, my MI11Ultra seems fast enough for everything, I'm not compiling on it).

And the M2 has massive caches (L1/L2/L3) https://en.wikipedia.org/wiki/Apple_M2

How much performance you get with caches are shown with the X3D models that - gaming performance - are faster than all than more expensive Intel/AMD chips.

            M2 Max   Ryzen 7900     
     Cores  12       12
     L1     320kb    64kb
     L2     32MB     12MB
     Last   48MB     64MB (32MB/chiplet)